Real-time auralization of time-varying sound fields with moving sound sources and listeners

通过移动声源和听众实时听出时变声场

• 批准号: 244441867
• 负责人: Professor Dr. Michael Vorländer
• 金额: --
• 依托单位: Lehrstuhl und Institut für Hörtechnik und Akustik (IHTA)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/244441867?language=en
• 关键词: Real; time; auralization; varying; sound

This research proposal deals with the real-time auralization of acoustic virtual scenes with fast moving sound sources and listeners. In recent years, sophisticated methods were developed, which allow the physically-based simulation of acoustics in real-time (geometrical acoustics, diffraction models, sound transmission models, etc.). Moving sources and listeners and the resulting Doppler effects have been simulated using simplified approaches only. In case of large distances between sources and listeners, these methods fail to simulate the sound propagation in a plausible way and free of artifacts. Trajectories of moving objects can be altered during runtime only to a limited degree, which puts a strong limitation on the interaction in virtual environments.Based on our long-term experience in this scientific domain, the aim of this project is to enhance recent approaches and to develop new real-time simulation methods for fast moving sources and listeners. The objective is not only to perform the auralization in real-time, enabling a passive listening experience in the virtual scene, but especially to focus on the user interaction, which is essential for Virtual Reality. Movements (trajectories) of all objects in the scene should be modifiable by the user in real-time. In order to achieve this goal new scientific findings are needed in the following areas: a) real-time motion modeling, b) physically-correct computation of sound propagation times in real-time and c) consideration of the temporally-correct parameters in the auralization, which demands the description of the variables in a virtual scene along a temporal history. These results will then be combined into a unified auralization approach. This requires not only an understanding of these individual fields, but also of their distinct interdependencies (motion modeling, sound propagation, scene data structures).The obtained scientific results will be implemented into the existing RWTH Aachen real-time auralization system, enabling it to serve as a tool for enhanced studies in the future (e.g. comprehensive noise scenarios in urban surroundings). The potential sound sources regarded in this project are cars, high-speed trains and aircrafts. Especially for noise research, like traffic and aircraft planning, such virtual environments could prove as a beneficial tool in the future.The initial two-year funding period is needed for the development of all required foundations and the implementation of the software tools. A subsequent third year is dedicated to subjective user studies with statistical psychoacoustic assessments. Here, the potential methods and parameters shall be compared in detail in order to optimize them for the application.

该研究建议涉及声音和听众快速的声音虚拟场景的实时听觉。近年来，开发了复杂的方法，该方法允许实时基于物理的声学模拟（几何声学，衍射模型，声音传输模型等）。仅使用简化方法模拟了移动源和听众以及所得的多普勒效应。如果来源和听众之间的距离很大，这些方法无法以合理的方式模拟声音传播。在运行时可以将移动物体的轨迹更改为有限程度，这在虚拟环境中对互动有很大的限制。基于我们在这个科学领域的长期经验，该项目的目的是增强最近的方法并开发新的实时仿真方法，以快速移动来源和听众。目的不仅是实时执行听觉化，从而在虚拟场景中具有被动的聆听体验，而且尤其是专注于用户互动，这对于虚拟现实至关重要。场景中所有对象的运动（轨迹）应实时修改。为了实现这一目标，需要在以下领域中进行新的科学发现：a）实时运动建模，b）实时对声音传播时间进行物理校正计算，c）考虑听觉化中的时间更正参数，要求沿时间历史沿时间历史上的虚拟场景中的变量描述。然后将这些结果合并为统一的听觉化方法。这不仅需要对这些单个领域的了解，而且还需要对它们独特的相互依存关系（运动建模，声音传播，场景数据结构）。获得的科学结果将在现有的RWTH Aachen实时听觉系统中实施，使其能够作为未来增强研究的工具（例如，在遍布周围环境中）。该项目中考虑的潜在音源是汽车，高速火车和飞机。特别是对于噪音研究，例如交通和飞机计划，这种虚拟环境将来可能被证明是一种有益的工具。开发所有必需的基础和实施软件工具需要最初的两年资金。随后的第三年致力于主观用户研究，并进行统计心理评估。在这里，应详细比较潜在的方法和参数，以便为应用程序优化它们。